www.heatingandv entilating.net From the editor Fromthe editor


Handling humidity


one the few times of the year in which HVR tackles the issue of humidification.


W


However, installers are susceptible to certain pitfalls because projects involving


humidification are not regularly undertaken by most HVAC contractors. To help out, UK sales manager at Condair Dave Marshall-George delivers some essential advice on pg 16 on what to look for.


The subject of humidification also play s a critical role in IAQ which was so widely


reported on in 2018 with regards to its effects on environments at work and at home.


On pg 17, John Barker of Humidity Solutions explores the urgent need for humidity control given that most of us spend 90 per cent of our time indoors.


Also in HVR January,we explore the unique needs of light commercial installations and some of the solutions on the mark et (pg 18); innovations in pipes and valves (pg 23) and the topical subject of wellbeing in buildings starting on pg 28.


Our HVR Domestic supplement beginning on pg 31 includes a must-read feature on fuel cell technology and its potential for the futur e of


Happy New Y ear! heating homes.


Heather Ramsden, Editor He Heather Ramsden, Editor eather Ramsden, Editor


ith heating in full use in homes and commercial buildings, the effects on humidity can be critical. As such it is


Cutting edg e heat & v


& ventve Ta Tailor-made vertical air towers A


Mansfield Pollard – ir management specialist


ventilation solutions was recently supplier of energy efficient


Towers) for a high-profile building vertical air handling units (Air manufacture 122 tailor made appointed to design and


solutions for the most complex and The manufacturer develops in central London.


chal lenging air management


applications and this project for a high-profile building In London was no exception. The brief was to design and manufacture the vertical air towers to deliver 4m3/s of conditioned air, along with built-in sound attenuation and an integrated controls package. The physical size and footprint of the unit was particularly critical as return air was to be taken from a high-level ceiling void and mixed with a minimum quantity of fresh air (also taken from a similarly high level), to suit the occupancy level. Following conditioning by the various internal AHU components to achieve the required range of air quality levels, the air was then supplied via underfloor ducts to the office floor areas. Measuring over three metres in height, the units were to be situated in extremely space restricted plantrooms around the perimeter of the designated office floors with a footprint of less than 3.5m unit. There were 16 units per floor positioned as handed pair s which would allow for unit r edundancy during planned preventative maintenance.


2 per


As the plant rooms containing the air towers were positioned on the busy office floors, noise breakout was of fundamental importance. Mansfield Pollards acoustic specialists worked alongside the air handling team to create an integrated attenuation solution. Manufactured from high grade, perforated galvanised steel with an inner cavity containing high density glass fibre slab, the team achieved break out noise reduction levels of 60dB(a) at1m.


Vertical units can cause various design challenges, specifically to effectivelymanagemoisture and remove any condensation generated by the cooling process. A bespoke chevron style drain traywas designed to capture the moisture dropping off the coil and allow smooth air passage. The drain tray captured and removed the condensatewithout generating any significant pressure drop,whichwould hav e affected fan performance and system efficiency.


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